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NMdem 3H. ASHGROPT & s. TUCKER.

Feed Water Heater.

Patented April 19,1881.

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N. PETERS. PHOTO-LITHUGRAPHER. WAsmNGToN. n C

UNITED STATES PATENT OFFICE.

EDWARD H. ASHCROFT, OF LYNN, AND SAMUEL TUCKER, OF BOSTON,MASSACHUSETTS; SAID TUCKER ASSIGNOR TO SAID ASHCROFT.

FEED-WATER HEATER.

SPECIFICATION forming part of Letters Patent No. 240,220, datedv April19, 1881.

Application filed February 26, 1881.

To all whom it may concern:

Be it known that we, EDWARD H. ASH CROFT, of Lynn, in the county ot'Essex and State of Massachusetts, and SAMUEL TUCKER, of Boston, in thecounty ot' Suffolk and State of Massachusetts, have invented a new anduseful Improvement in Feed-Water Heaters, Condensers, Snc.; and we dohereby declare that the following is a full, clear, and exactdescription thereof, reference being had to the accompanying drawing, inwhich the figure represen ts a sectional view ot a device embodying ourinvention, which relates to a construction of the separable parts thatcompose the shell or casing, whereby the connection of the tube-sheetsand bonnets or heads with the body of the shell or casing will permit avariable expansion of the several parts without strain, and alsofacilitate a separation ot' the same for cleansing and repairs.

In order that others may understand this invention, we will tirstproceed to describe fthe shell or casing, b the bonnets or heads,

c an annular ring connecting thebody and head, and d a nest or series oflongitudinal tubes arranged within the shell and txed at their oppositeends to transverse plates or sheets The arrangement of the tubes d anddivision of the interior of the apparatus to provide the chamberedportions with the inlet and discharge'openings are the same as in otherapparatus of such kind, and are no part of our invention. Therefore itis not deemed necessary to further refer to such interior arrangementthat may be varied to suit the particular use to which our invention maybe adapted, which relates solely to such separable parts of thestructure exposed to variable temperatures, and which are so joinedtogether as to permit the unobstructed action to the different rates ofexpansion and contraction to which the parts are subjected, due to suchvariations in temperatures.

(No model.)

To this end we construct the annular ring c in substantially the form incross-section shown in the drawing, and connect the body or casing a andthe bonnet or head b with a beveled joint, and secure the respectiveparts together by means ot' the tie-rods, which engage with projectinglugs upon the base of the annular ring and bonnets or heads, and areheld in place by the threaded nuts, as shown, or which may be secured bya slot and key, or other equivalent means.

The tube-sheets e are provided with anges at the periphery, turnedinwardly to providev a suitable bearing within the internal recess ot'the annular ring, said recess being of suicient length to permit anelongation of the tubes and consequent movement ot' the tubesheets, andin depth about iiush with the inner surface of the shell or casing a.Each ofthe respective joints may -beprovided with a circumferentialgroove to receive a suitable packing, as shown at h, it' necessary.

The advantages attending this construction in an apparatus of this kindare obvious, the numerousbolts generally used to secure the bonnetsbeing dispensed with, and such expedients substituted that not onlyinsure equal strength, but are more readily applied and adjusted inmaintaining close joints, beside facilitating a separation of the parts.

Having thus fully described our invention, what we claim, and desire tosecure by Letters Patent, is-

A shell or casing for feed-water heaters, condensers, or similarapparatus, provided with a separable annular ring, recessed, as shown,interposed and joined to the shell or casing and bonnet or head by abeveled joint, and forming a support to the tube-sheet, substantially asshown, and for the purpose set forth.

EDWARD H.. ASHCROFT. SAMUEL TUCKER.

Witnesses CHAs. W. FoRBEs, F. T. TAPLEY.

